Electric energy quality on-line monitoring device

Abstract

The utility model discloses an electric energy quality on-line monitoring device, which comprises a box body, an alternating current and input and output board card, a CPU board card and a power supply board card are detachably inserted on the rear end face of the box body, a key display board card is arranged on the front end face of the box body, the front end face of the box body is connected with the rear end face of the box body through an adapter plate, and the adapter plate is connected with the power supply board card. The CPU board card adopts a multi-core processor, a synchronous sampling AD chip and a storage chip, the AD sampling chip converts an alternating current signal into a direct current signal and sends the direct current signal to a CPU, and the CPU samples, calculates, analyzes and counts the signal to obtain electric energy quality data and controls the action of a relay and interface display at the same time. According to the utility model, the modularized clamping piece is adopted, the rear part of the device is composed of the alternating current and input / output board card, the CPU board card and the power supply board card, and the plugging and replacement are convenient.

Description

Technical Field

[0001] The utility model relates to the field of on-line power quality monitoring devices, and particularly relates to an on-line power quality monitoring device. Background Technique

[0002] At present, the main methods for monitoring power quality at home and abroad are on-line monitoring, which can realize functions such as acquisition, measurement, analysis, and communication transmission of AC input signals. However, some devices have the defect of complex installation structures due to special size structures, large development technical difficulties, and other problems. Summary of the Invention

[0003] Aiming at the above problems, the utility model provides an on-line power quality monitoring device, which solves the defect of complex installation structures of some existing devices due to special size structures, large development technical difficulties, and other problems.

[0004] The technical solution adopted by the utility model is as follows:

[0005] An on-line power quality monitoring device includes: a box body, an AC and input / output board card, a CPU board card, and a power supply board card are detachably plugged into the rear end face of the box body, a key display board card is installed on the front end face of the box body, the front end face of the box body is connected to the rear end face of the box body through an adapter board, the CPU board card adopts a multi-core processor, a synchronous sampling AD chip, and a storage chip, the AD sampling chip converts an AC signal into a DC signal and sends it to the CPU, and the CPU samples, calculates, analyzes, and statistically processes the signal to obtain power quality data, and at the same time controls the action of the relay and the interface display.

[0006] When in use, the utility model generally adopts an embedded installation method, which can be centrally installed on the control panel in the control room or dispersedly installed on the switch cabinet. The utility model adopts modular cards, and the rear part of the device is composed of an AC and input / output board card, a CPU board card, and a power supply board card, which is convenient for plugging and replacing.

[0007] Optionally, the AC and input / output board card includes voltage and current transformers, relays, and isolation optocouplers.

[0008] Optionally, the CPU board card includes a USB interface, an RS485 communication interface, and multiple RJ45 network interfaces.

[0009] Optionally, the USB interface is used to insert a USB flash drive to copy the internal event records and waveform files of the device.

[0010] Optionally, the power supply board card adopts a high-reliability AC / DC dual-use power module and a supporting EMC filtering module.

[0011] Optionally, the button display board uses a dot matrix color liquid crystal screen. The button display board is connected to the adapter board by a long row of wires, and the back board of the device is directly connected to the adapter board by a connector.

[0012] Optionally, a display screen is installed on the upper part of the front end face of the box body, and a row of warning lights is arranged below the display screen.

[0013] Optionally, a plurality of circular buttons are arranged below the warning lights.

[0014] Optionally, first arc-shaped buttons are arranged on the left and right of the circular button, and second arc-shaped buttons are arranged above and below the circular button. The circular button, the first arc-shaped button and the second arc-shaped button form a button group located in the middle, and outer buttons are arranged at the four corners of the button group. The circular button, the first arc-shaped button, the second arc-shaped button and the outer button of the present utility model do not interfere with each other.

[0015] Optionally, the button is used for viewing data and setting parameters on the display interface.

[0016] Beneficial effects

[0017] 1. The on-line power quality monitoring device of the present utility model uses a standard 6U all-aluminum shell chassis and has a variety of installation methods.

[0018] 2. The present utility model adopts modular cards, which are convenient to plug and replace.

[0019] 3. The present utility model uses a 32-bit high-performance multi-core platform and an embedded operating system, and has a variety of interface functions such as a 485 communication interface, an RJ45 network port, and a USB interface. Description of the drawings

[0020] Figure 1 is a three-dimensional structure diagram of the on-line power quality monitoring device according to Embodiment 1 of the present utility model;

[0021] Figure 2 is the control unit flow of the on-line power quality monitoring device according to Embodiment 1 of the present utility model;

[0022] Figure 3 is the circuit diagram of the on-line power quality monitoring device according to Embodiment 1 of the present utility model.

[0023] Each reference numeral in the figure is as follows:

[0024] 1. Display screen, 2. Circular button, 3. First arc-shaped button, 4. Second arc-shaped button, 5. Outer button, 6. Warning light. Specific embodiments

[0025] The following will further describe in detail the specific embodiments of the present utility model in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0026] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] Embodiment 1

[0028] The technical solution adopted by the present utility model is as follows:

[0029] As Figure 1 , Figure 2 and Figure 3 shown, the present utility model discloses an on-line power quality monitoring device, including: a box body, a AC and input / output board card, a CPU board card, and a power supply board card are detachably inserted into the rear end face of the box body, a key display board card is installed on the front end face of the box body, the front end face of the box body is connected to the rear end face of the box body through an adapter board, the CPU board card adopts a multi-core processor, a synchronous sampling AD chip and a storage chip, the AD sampling chip converts the AC signal into a DC signal and sends it to the CPU, and the CPU samples, calculates, analyzes, and statistics the power quality data, and at the same time controls the action of the relay and the interface display.

[0030] The AC and input / output board card includes voltage and current transformers, relays, and isolation optocouplers. The CPU board card includes a USB interface, an RS485 communication interface, and multiple RJ45 network interfaces. The USB interface is used to insert a USB flash drive to copy the internal event records and waveform files of the device. The power supply board card uses a high-reliability AC / DC power module and a supporting EMC filtering module.

[0031] The key display board uses a dot matrix color liquid crystal screen. The key display board is connected to the adapter board by a long wire. The back board of the device is directly connected to the adapter board by a connector. In this embodiment, the device uses a standard 6U all-aluminum case with a structural size of 189.1*266*231mm. When in use, it generally adopts an embedded installation method and can be centrally installed on the screen cabinet in the control room or dispersed on the switch cabinet.

[0032] The main components of the AC and input / output board include voltage and current transformers, relays, isolation optocouplers, etc. It should be noted that the CPU board uses a high-performance multi-core processor, a high-precision synchronous sampling chip, and a large-capacity high-speed storage chip. At the same time, it includes 1 USB interface, 1 RS485 communication interface, and two RJ45 network ports. The power board uses a high-reliability power module that can be used with AC or DC power and a supporting EMC filtering module. The key display board uses a 480*320 pixel dot matrix color liquid crystal screen and 9 keys, which is convenient to operate.

[0033] A display screen 1 is installed on the upper part of the front end face of the box body, and a row of warning lights 6 are arranged below the display screen. The keys are used to view data and set parameters on the display interface.

[0034] A circular key 2 is arranged below the warning light. The first arc-shaped keys 3 are arranged on the left and right of the circular key, and the second arc-shaped keys 4 are arranged above and below the circular key. The circular key, the first arc-shaped keys, and the second arc-shaped keys form a key group in the middle, and outer keys 5 are arranged at the four corners of the key group.

[0035] When this embodiment is implemented, the three-phase AC voltage and current signals are connected to the internal voltage and current transformers through the interfaces of the device's AC and input / output board, and are converted into small signals and then sent to the high-precision synchronous sampling AD chip. The AD sampling chip converts the AC signal into a DC signal and sends it to the CPU. The CPU samples, calculates, analyzes, and statistics the signals to obtain power quality data and transmits it through the RS485 interface or network port. At the same time, it controls the action of the relay and the interface display. The digital quantity signals are input into the AC and input / output board and then sent to the CPU after being isolated by the optocoupler. Operations such as data viewing and parameter setting can be performed on the display interface through the keys. A USB flash drive can be inserted through the USB interface to copy the internal event records, waveform files, etc. of the device.

[0036] The above is only the preferred embodiment of the present utility model, and it does not limit the protection scope of the patent of the present utility model. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model, directly or indirectly applied in other related technical fields, shall be included in the protection scope of the present utility model by the same token.

Claims

1. An on-line power quality monitoring device, characterized in that, Comprising: A box body, on the rear end face of which an AC and input / output board card, a CPU board card, and a power supply board card are detachably plugged. On the front end face of the box body, a key display board card is installed. The front end face of the box body is connected to the rear end face of the box body through an adapter board. The CPU board card adopts a multi-core processor, a synchronous sampling AD chip, and a storage chip. The synchronous sampling AD chip converts an AC signal into a DC signal and sends it to the CPU, and the CPU samples, calculates, analyzes, and statistics the signal to obtain power quality data, and at the same time controls the action of the relay and the interface display.

2. The on-line power quality monitoring device according to claim 1, characterized in that, The AC and input / output board card includes voltage and current transformers, relays, and isolation optocouplers.

3. An on-line power quality monitoring device according to claim 1, characterized in that, The CPU board card includes a USB interface, an RS485 communication interface, and multiple RJ45 network ports.

4. An on-line power quality monitoring device according to claim 3, characterized in that, The USB interface is used to insert a USB flash drive to copy the internal event records and waveform files of the device.

5. An on-line power quality monitoring device according to claim 1, characterized in that, On the power supply board card, a highly reliable AC / DC dual-use power supply module and a supporting EMC filtering module are adopted.

6. An on-line power quality monitoring device according to claim 1, characterized in that, The key display board card uses a dot matrix color liquid crystal screen. The key display board card is connected to the adapter board by a long row of wires, and the back board cards of the device are directly connected to the adapter board by connectors.

7. An on-line power quality monitoring device according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that, On the upper part of the front end face of the box body, a display screen is installed, and a row of warning lights is provided below the display screen.

8. The on-line power quality monitoring device according to claim 7, characterized in that, Below the warning lights, a plurality of circular keys are provided.

9. The on-line power quality monitoring device according to claim 8, wherein On the left and right of the circular keys, first arc-shaped keys are provided, and on the top and bottom of the circular keys, second arc-shaped keys are provided. The circular keys, the first arc-shaped keys, and the second arc-shaped keys form a key group located in the middle, and outer keys are provided at the four corners of the key group.

10. The on-line power quality monitoring device according to claim 9, characterized in that, The keys are used for data viewing and parameter setting on the display interface.

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